Malicious PDF — malware analysis report

Static analysis result for SHA-256 660ba0aa0feb4535…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 10:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b7429e33828c0a7a0be5ec311085a5a SHA-1: f337b13413a2975bf50c72e44f41136aced210a0 SHA-256: 660ba0aa0feb45354337c5be043e1d4a553fb320469db8b1f8564b9e20e818ca
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though partially garbled, also contains references to game hacks and the same suspicious URL. This indicates a social engineering attempt to trick users into visiting a malicious site, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-hack-1021-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-generator-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/if-everything-was-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/easy-working-ways-to-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-roblox-accounts-rich-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/speed-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-2021-ipad_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/i-hacked-it-roblox-piano_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/games-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-hack-tool-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-hacking-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-hack-get-unlimited-gems-and-gold-irobux-fun_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C8 23376 bytes
SHA-256: 899769ae531a31e05cde76cfbecb0143af593f57b34ab0cda6d1c2476eb1a7cf
font_01_sfnt_off000068b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 18408 bytes
SHA-256: bbde38aa9261b3681415098ebb56e64fed41e793e0f246cbe9fa73cc4ed2531e

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